Helpful debugging commands for Kube Reserved Resources & CGroups

kube-reserved-resources-debugging.sh

# Query current usage for runtime, kubelet and pods
curl -s http://localhost:10255/stats/summary | jq .node.systemContainers

# Quick scan of the cgroup paths to see what does exist
ls -ld /sys/fs/cgroup/**/podruntime.slice
ls -ld /sys/fs/cgroup/**/system.slice

# Validate what cgroup a single process uses
cat /proc/$(pidof kubelet)/cgroup

# Recursively show the contents of a control group
systemd-cgls

# Show top control groups by their resource usage
systemd-cgtop